The crosslinking of poly(vinyl alcohol) (PVA) with glutaraldehyde at 80°C was characterized by viscosity and pulse field gradient (PFG) nuclear magnetic resonance (NMR) techniques. NMR signified an initial dormant period of approximately 6hr, in which the self-diffusion coefficient of PVA was ...
展开更多 In this thesis, PVA/CS hydrogel was prepared by crosslinking with glutaraldehyde vapor. We observed the effect of different mass ratio of PVA and CS on the hydrogel morphology by scanning electron microscopy. Studies have shown that with the increase of chitosan, the su...MORE 作者...
Glutaraldehyde (GA) solution, which was 50 wt% in deionized water, was added to the PVA solutions, and the ratios of GA and PVA were shown in Table 1. Diluted hydrochloric acid was added to the solutions to obtain an acidic Determination of GA:PVA ratio for crosslinking Fig. 4. ...
Poly(vinyl alcohol), (PVA)/laponite pervaporation membranes were fabricated via simple exfoliation method of the nanoclay in the polymer solution followed by chemical crosslinking using glutaraldehyde (GA). The fabricated membranes were employed to study the pervaporation desalination performance when ...
PVA polymers have been well-known as water-absorbing materials but their brittle nature hinders their applicability. In this study, we enhanced the strength of hydrogel and its water-absorbing capabilities by glutaraldehyde-assisted crosslinking of starch with PVA and blending BMIM-BF4to enhance the ...
The crosslinking agent with glutaraldehyde has been crosslinked, but the water absorbability of the film reduces. Used by glycerol and propylene glycol as the plasticizer, surfactant twelve sodium dodecyl sulfate as foaming agent, water soluble of PVA/ starch films were prepared by solution casting ...
linkingchitosan/PVAblendfilmswithglutaraldehydehadbeendestroyedandhadasmallers welling degree.pHsensitivityofthechitosan/PVAblendfilmscanbechangedbytheconcentrationoft hecross-link—— ingagent. Keywords:chitosan;PVA;moistheattreatment;structurecharacterization;waterresistance ...
Furthermore, when comparing the SEM morphology before (Fig. 1(a–c)) and after crosslinking (Fig. 1(d–f)), no significant differences Conclusions Core-shell nanofiber membranes using PVA as core and GelMA with CeO2 nanoparticles addition as shell have been successfully fabricated using coaxial...
In this work, a pH-sensitive and antibacterialdrug delivery systembased on poly(vinyl alcohol) (PVA)/citric acid (CA)/Ag nanoparticles (NPs) was designed using a completely green, facile and one-step route. Interestingly, the crosslinking ofPVAwith CA, and in-situ formation of AgNPswithin ...
Preferably, the CH-X-PVA according to the invention will be synthesized by crosslinking the PVA in a diluted aqueous solution, having a molecular weight of 30,000 to 250,000, the glutaraldehyde (GA), with controlled stirring, at a pH<5, and preferably between 3 and 4 for technical reason...